公开(公告)号：US09780901B2

公开(公告)日：2017-10-03

申请号：US13311175

申请日：2011-12-05

申请人： Shan Cheng ,  Youn Sun Kim ,  Ju Ho Lee ,  Jin Kyu Han

发明人： Shan Cheng ,  Youn Sun Kim ,  Ju Ho Lee ,  Jin Kyu Han

IPC分类号： H04H20/71 ,  H04W4/00 ,  H04J11/00 ,  H04W72/00 ,  H04L5/00

CPC分类号： H04J11/0079 ,  H04L5/0023 ,  H04L5/0032 ,  H04L5/0048 ,  H04L5/0069 ,  H04L5/008 ,  H04L5/0091 ,  H04W72/005

摘要： An apparatus and method for transmitting reference signals in a communication system are provided. The method includes transmitting common reference signals of a first type from a transmitter to a plurality of receivers; transmitting receiver-specific reference signals of a second type from a plurality of distributed ports to a subset of the plurality of receivers; wherein the common reference signals of the first type and the receiver-specific reference signals of the second type are allocated to different resources from one another, and wherein the communication system includes the transmitter and the plurality of receivers and the transmitter uses a plurality of central ports and the plurality of distributed ports to transmit to the plurality of receivers.

公开(公告)号：US08908548B2

公开(公告)日：2014-12-09

申请号：US13313642

申请日：2011-12-07

申请人： Cheol Mun ,  Sung Tae Kim ,  Jong Kwan Yook ,  Youn Sun Kim ,  Jin Kyu Han

发明人： Cheol Mun ,  Sung Tae Kim ,  Jong Kwan Yook ,  Youn Sun Kim ,  Jin Kyu Han

IPC分类号： H04J3/14 ,  H04W72/08 ,  H04W24/10 ,  H04W48/08 ,  H04W48/20

CPC分类号： H04W72/085 ,  H04W24/10 ,  H04W48/08 ,  H04W48/20

摘要： Feedback methods and apparatuses are provided for efficiently feeding back downlink Channel State Information (CSI) using limited information in a DAS-based wireless communication system. A method includes determining, by a receiver, a candidate Antenna Port (AP) set from among a plurality of APs; selecting an active AP set from the candidate AP set; and transmitting the candidate AP set, the active AP set, and the downlink CSI of active APs included in the active AP set.

摘要翻译： 提供了反馈方法和装置，用于在基于DAS的无线通信系统中使用有限的信息有效地反馈下行链路信道状态信息（CSI）。 一种方法包括由接收机确定多个AP之中的候选天线端口（AP）集合; 从所述候选AP集合中选择活动AP集合; 并且发送候选AP集，活动AP集合和活动AP集合中包括的活动AP的下行CSI。

公开(公告)号：US08842610B2

公开(公告)日：2014-09-23

申请号：US13516965

申请日：2010-12-28

申请人： In Ho Lee ,  Youn Sun Kim ,  Jin Kyu Han

发明人： In Ho Lee ,  Youn Sun Kim ,  Jin Kyu Han

IPC分类号： H04W24/10 ,  H04L1/00 ,  H04L5/00 ,  H04B7/06

CPC分类号： H04L5/0053 ,  H04B7/0626 ,  H04B7/0647 ,  H04L1/0026 ,  H04L1/0027 ,  H04L5/0048 ,  H04L5/005 ,  H04L5/0057 ,  H04W72/0413 ,  H04W72/0446 ,  H04W88/02 ,  H04W88/08

摘要： An apparatus and a method are provided for transmitting feedback information by a User Equipment (UE) in a communication system. The method includes generating, by the UE, first feedback information; transmitting the first feedback information at a first time point in a first period; generating second feedback information; and transmitting the second feedback information at a second time point in a second period. The first time point and the second time point are different points from start points of the first period and the second period, respectively.

摘要翻译： 提供了一种用于在通信系统中由用户设备（UE）发送反馈信息的装置和方法。 该方法包括由UE生成第一反馈信息; 在第一时段中的第一时间点发送所述第一反馈信息; 产生第二反馈信息; 以及在第二时段的第二时间点发送所述第二反馈信息。 第一时间点和第二时间点分别是与第一周期和第二周期的起始点不同的点。

公开(公告)号：US08724607B2

公开(公告)日：2014-05-13

申请号：US13371935

申请日：2012-02-13

申请人： Jin Kyu Han ,  Cheol Mun ,  Sung Tae Kim ,  Youn Sun Kim ,  Jong Kwan Yook

发明人： Jin Kyu Han ,  Cheol Mun ,  Sung Tae Kim ,  Youn Sun Kim ,  Jong Kwan Yook

IPC分类号： H04B7/216

CPC分类号： H04B7/0689 ,  H04B7/024 ,  H04B7/0417 ,  H04B7/0482 ,  H04B7/063

摘要： A transmission method and apparatus utilizing Multiple-Input and Multiple-Output (MIMO) precoding based on Distributed Antenna Systems (DASs) are provided. The transmission method includes determining active antenna ports, for a User Equipment (UE) having multiple receive antennas, from among a plurality of Distributed Antenna Ports (DAPs) evenly placed in a service area; assigning a Multiple-Input and Multiple-Output (MIMO) mode to the UE and notifying the UE of the MIMO mode assignment; determining a signal precoding vector on a basis of feedback information for the MIMO mode received from the UE; and precoding a signal using the signal precoding vector and transmitting the precoded signal through the active antenna ports.

摘要翻译： 提供了一种利用基于分布式天线系统（DAS）的多输入多输出（MIMO）预编码的传输方法和装置。 传输方法包括从均匀放置在服务区域中的多个分布式天线端口（DAP）中确定用于具有多个接收天线的用户设备（UE）的有源天线端口; 向所述UE分配多输入多输出（MIMO）模式，并向所述UE通知所述MIMO模式分配; 基于从UE接收的MIMO模式的反馈信息，确定信号预编码矢量; 并使用信号预编码矢量对信号进行预编码，并通过有源天线端口发送预编码信号。